#04-07-30-013D: Automatic Transmission Shift and Engine Driveability Concerns and/or MIL ON Due to Aftermarket Oil Bath Type Air Filter Use – (Nov 22, 2017)
Subject: |
Automatic Transmission Shift and Engine Driveability Concerns and/or MIL ON Due to Aftermarket Oil Bath Air Filter Use |
Models: |
2018 and Prior GM Passenger Cars and Light Duty Trucks |
Attention: |
This Bulletin also applies to any of the above models that may be Export from North America vehicles. |
This Bulletin has been revised to add the 2017-2018 Model Years. Please discard Corporate Bulletin Number 04-07-30-013C.
DO THIS |
DON’T DO THIS |
Inspect the vehicle for an aftermarket oil bath air filter that may be excessively over oiled. |
DO NOT repair or replace any MAF or MAF/IAT sensor under warranty if the Cause of the Condition is a result of the use of an oil bath air filter that is excessively over oiled resulting in contamination of the sensor. |
The use of an aftermarket oil bath air filter that is excessively over oiled may result in any of the following to occur:
- The malfunction indicator lamp (MIL) may illuminate and a diagnostic trouble code(s) DTC may set.
- The automatic transmission may shift early and/or late, slipping and/or damaged clutch(es) or band(s).
- Engine driveability concerns such as but not limited to: poor acceleration from a stop, stumble, rough idle and/or limited engine RPM range.
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